Crushing and breaking apparatus



Nov. 29, 1938. w. A. HISCOX CHUSHING AND BREAKING. APPARATUS Filed Dec. 30, 1935 3 Sheets-Sheet l km *N um smw 6mm Nov. 29, 19381 7 w. A. Hlscox 2,138,657

CRU SHING AND BREAKING APPARATUS Filed Dec. 30, 1935 3 Sheets-Sheet 2 A'TroIQA/EY Nov. 29, 1938. w. A. Hlscox CRUSHING 6ND BREAKING APPARATUS Filed Dec. 50, 1935 3 Sheegs-Sheet 5 v Patented Nov. 29, 1938 v CRUSHING AND BREAKING APPARATUS William Arthur Hiscox, Littleover, near Derby, England Application December 30, 1935, Serial No. 56,729 In Great Britain January 10, 1935 3 Claims. (CI. 83-53) This invention relates to crushing and breakable about shafts 23, 24 respectively mounted in ing apparatus for stone and like materials, more bearing housings 38 carried by the girders it especially to crushers with oscillating or vibrator frame; in this way a rocking up-and-down ing jaws. v movement is imparted to the jaws, through the According to the present invention a pair of crank mechanism l5, I6, connecting rod ll, rockoscillating jaws are provided with a main crushing member [8 and links 20, so that the jaws 2 l, ing zone and a lower secondary crushing zone, 22 rock about their axes. Instead of the rockthe contours of the crushing faces being such, ing member being a casting as shown, a rocking and the reciprocating motions being so applied, lever or a pair of parallel rocking levers may be that during a movement of the jaws in one direcused to transfer the motion from the connecting 10 tion the main zone is constricted and the secrod I! to the links 20; further, instead of one ondary zone opened out for discharge, whilst link 20 to each jaw a pair of links may be used during a return movement in the opposite directo each, one at the front and one at the back. tion of the crushing faces the secondary zone is As shown one of the links 25 (to the jaw 2 i) is constricted for the further crushing of material at the front and the other one (to the jaw 22) is 15 which has fallen from the main zone, the latter at the back, but for the sake of clarity both links being meanwhile opened out toreceive further are indicated in Figure 2. The rocking member material to be crushed during the ensuing move- I8 is provided with an alternative bearing 25 to ment in the first direction of the crushing faces. attach to the connecting rod ll; when this al- The invention will now be described with refternative connection is used the amount of move- 20 erence to the accompanying drawings wherein: ment imparted to the jaws is reduced, and also Figure 1 is a plan of a crushing apparatus. the heads are lowered, the lower part of the jaws Figure 2 is a longitudinal section on line 2-2 opening wider and the centre zone crushing faces of Figure 1. being closer together; the jaws are then adjusted Figures 3, 4, Sand 6 are diagrams showing the by means to be described so as to bring the crush- 25 crushing jaws in different positions to be exing faces of the jaws still closer together; this plained. provision isfor the crushing of very hard ma- A structure is provided having a pair of side terials. The jaws 2!, 22 each comprise a stock girders ID, or a suitable frame near to one end of 39 of substantially triangular form in side elewhich a shaft l l is carried in suitable bearings. vation. The face members 26 are secured to the 30 A belt pulley I2 is bolted at l3 to the spokes of heads 39 of the stocks by bolts 46 or otherwise a fly-wheel I3 which is rotatably mounted on the and the heads are very heavy to facilitate crushshaft. A shearable plug M or a plurality thereof ing operations. The crushing faces of the jaws is let into grooves 4| in the fly-wheel boss [3 provide three crushing regions, a top pocket 2?,

and in an independent sleeve 12 which is tighta central main crushing zone 28 and a bottom 5 ened up on to the plugs by a screw E2 The zone 29, see especially Figures 3 to 6. The slope drive is therefore from the pulley l2 through the 2'! between the middle zone and the top pocket bolts l3 to the fiy-wheel I3, from the boss l3 is such that stones will not be crushed in an inv of the fiy-wheel through the plug M to the sleeve termediate position; if too large to enter the 12 and from the sleeve l2 to the shaft II to middle zone they will ride up the slope as the jaws 40 which said sleeve is fixed by akey I2 descend and so be trapped and crushed in the In the event of an excessive strain the plug [4 top pocket. The upper parts of the jaw stock or plugs willshear and prevent more serious damheads 39 are rounded as shown at 30, Figure 2 age. The shaft II has crank webs l5 and to the to provide a lead into the top pocket 21'. The

crank pin I6 a connecting rod I1 is attached, and jaw faces are shown with flutes or teeth 3! but 45 on the lower end of the connecting rod a rocking may be wholly or partly plain if preferred. In the member 18 is mounted. As shown the rocking arrangement shown the vertical flutes are fairly member I8 is a casting or forging which widens deep and wide in the top pocket: in the middle out and has trunnion ends (not seen on the zone they are somewhat shallower and closer todrawings) so as to fit into end bearings [9 formgether; in the bottom zone there are still smaller 50 ing an axis about which the member 18 rocks vertical flutes on the jaw 22 and horizontal teeth and has a pair of extensions l8 one at each side on the jaw 2|. The stock of the jaw 2i extends to which links 20 are pivotally connected, the downwardly below the bottom opening between upper ends of the links 20 being pivotally atthe jaw crushing faces and carries one or more tached to the heads of jaws 2|, 22 pivotally movbrackets 32 to which is bolted a foot plate 33 55 acting as a lip and regulating the discharge of the crushed material, shims or thin pieces of metal 42 being interposed between plate and bracket to enable the position of the plate relative to the jaws to be adjusted.

For varying the opening between the crushing faces, the jaw 22 is capable of being moved nearer to or farther away from the jaw 2% under the action of wedges 34, the wedges being threaded on to a rod 35 having leftand right-hand threads, so that by rotating the rod the wedges may be drawn closer together or moved farther apart. To effect this adjustment a tommy-bar or the like is inserted in holes in the collar 31 fixed on the rod 35 and the jaw moved to its new position by the force of the wedges, after the lock nuts 35 have been slackened.

Referring now to the diagrammatic views, Figures 3, 4, and 6, which show the cycle of movements of the crushing faces; in Figure 3 the jaws have risen from the position of Figure 6: crushed material is trapped in the bottom zone 29, and the top pocket 2'! is fully open receiving a fresh charge; in Figure 4 the jaws have fallen; a preliminary crushing is about to take place in the top pocket 21, the main central crushing zone 28 is becoming operative and the bottom 29 is opening; in Figure 5 the jaws have fallen far-- ther; the operations referred to in connection with Figure 4 have proceeded and the bottom discharge has commenced; in Figure 6 the jaws are in their lowest position; the top and centre crushings are completed and these zones are at minimum distance apart: the bottom zone is fully open and has discharged; material is falling down from the centre zone to the bottom zone and during the next half-cycle back to the position shown in Figure 3 there will be a secondary crushing of this material on the upstroke, in the reverse direction to that described, meanwhile material will fall from the top pocket into the middle zone and a fresh supply will be admitted into the top pocket. Thus at no time is there an idle period, large stones are crushed in successive stages continuously during the whole cycle of movement of the jaws.

Having described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a crushing and breaking apparatus the combination with a pair of co-operating substantially triangularly shaped jaws pivotally mounted at their apexes for vertically oscillating crushing movement and actuating means for imparting an oscillating motion to said jaws, said jaws having crushing faces adapted to perform primary crushing on the downstroke and secondary crushing on the upstroke, a discharge restricting element secured to the lower end of one of said jaws, overlapping the lower end of the second jaw when said jaws are in their uppermost position, thus closing the space between the lower ends of said jaws to retain material in the lower space between the jaws for secondary crushing, said element during the downward movement of said jaws being gradually moved away from the second jaw so as to gradually expose the space between the lower ends of said jaws, whereby crushed material may be discharged from said lower space.

2. In a crushing and breaking apparatus the combination with a pair of co-operating substantially triangular shaped jaws pivotally mounted at their apexes for vertically oscillating crushing movement and actuating means for imparting an oscillating motion to said jaws, said jaws having crushing faces adapted to perform primary crushing on the downward stroke and secondary crushing on the upward stroke, discharge restricting elements adjustably secured to the lower end of one of said jaws, overlapping the lower end of the second jaw when said jaws are in their uppermost position, thus closing the space between the lower ends of said jaws to retain material in the lower space between the jaws for secondary crushing, said element during the downward movement of said jaws being gradual 1y moved away from the second jaw so as to gradually expose the space between the lower ends of said jaws, whereby crushed material may be discharged from said lower space.

3. A crushing and breaking apparatus comprising a frame, a shaft mounted on said frame, driving means for said shaft, crank webs on said shaft, a crank-pin carried by said webs, a connecting rod attached to said pin, a rocking member pivotally mounted intermediate its ends in said frame, two bearings at one end of said rocking member, said connecting. rod being attach able to either of said bearings, a pair of extensions at the opposite end of said rocking member at each side thereof, housings secured to said frame, a pair of shafts carried horizontally across said frame in spaced parallel relation and mounted in said housings, a pair of substantially triangular jaw stocks mounted one on each of the shafts mounted in said housings, links respectively connecting the said extensions to said jaw stocks, said links being adapted to impart a rising and falling rotative motion to said jaw stocks under the action of said rocking member, wedges co-operatively associated withone of said jaw stocks, operating means for said wedges, said wedges being adapted when actuated to force one jaw stock horizontally towards the other, opposed crushing face members secured one to each head, said crushing face members being formed to provide an upper preliminary crushing zone, a

downwardly extending portion on one of said jaw stocks, at least one bracket carried by said portion, a foot-plate carried by said bracket, said bracket extending below the opening between the crushing faces and partly under the opposite jaw-stock. a

- WILLIAM ARTHUR HISCOX; 

